Stop mechanism for looms



March 1927.

H A. DAVIS STOP MECHANISM FOR LOOMS Filed July 22. 3.925 2 Sheets-$heefi 1 \nv e nTor. Hurry A.Duvis lmmumn I I March 8, 1927 1,620,194

. H. A. DAVIS STOP MECHANISM FOR LCOMS Filed July 22. 1925 2 s et :5

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Harry A. Du vs by%a/WMIQW A'i'fys Patented Mar. 8, 1927. i l j UNITED 'STA 1 PAEENT OFFICE.

HARRY A. DAVIS, F HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER CORPORA- TION, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

STOP MECHANISM FOR LOOMS.

Application filed July 22, 1825. Serial No. 45,425.

This invention relates to improvements lowing description and the accompanying 55 in stop mechanisms for looms of the easy drawings and will be particularly pointed type shipping motion in which the driving out in the claims. clutch is actuated by a toggle mechanism Inasmuch as the present invention relates which when moved to extended position by merely to the clutch-actuating mechanism the shipper sets the clutch in operative 100- only so much of the loom structure is il- 60 sition and upon bang-off breaks the toggle lustrated as is necessary to show the relaand causes the clutch members to be disention of the present invention thereto. a d, In the drawings.

In usual constructions the shipper and Fig. 1 is a side elevati a a portion of a brake lever, which are mounted upon a comloom side and the mechanism embodying 65 mon shaft, .are moved from running to stopthe present invention mounted thereon, the ping position by engagement with the brake parts being shown in running position; and, lever of an arm which is carried by and de- Fig. 2 is a detail plan view showing the pends from the frog forming part of the clutch-actuating mechanism.

protector mechanism. As illustrated in the accompanying draw- 70 In the operation of the stop mechanism ings the main driving shaft 1 of the 100111 this arm is sometimes broken oil, or becomes 18 mounted on suitable bearings upon the loose upon the frog, so that the loom will loom side 2 and an auxiliary frame 3 and t t upon bang-ofi". Furthermore the has fixedly secured to it a gear at which cofrog is sometimes lifted from its seat by Operates with other gears (not shown) to 75 reason oi unusual pressure between the arm ac uate certain of the moving parts of the and the brake lever, thus causing improper loom. The gear 4- has secured to it a clutch operation of the stop mechanism or break member 5 which is adapted to cooperate a f parts with a co-operating clutch face of a driving The object of the present invention is to gear 6 which is rotatably and slidably provide an improved means for releasing the mounted upon the shaft and is actuated clutch which acts directly upon the clutchby a suitable motor. The hub 7 of the drivactuating means, thereby avoiding such 111g gear 6 has mounted upon it a collar 8 breakage and other defects of the previous provided with trunnions 9 which are en Constructions gaged by the bifurcated end 10 of a lever A further object of the invention is to pro- 11 which when actuated moves the main gear vide mechanism for actuating the clutch 6 longitudinally of its shaft to cause its from the protector mechanism with cushionclutch face to engage the co-operating clutch 35 ing means which will diminish the jar proface of the gear .4. The lever 11 is fulduced in usual stop mechanisms. crumed upon the pivoted end of an adjust- A further object of the invention is to able stud 12 which is mounted in a stand provide a clutch actuating mechanism oper- 13 secured to the auxiliary frame 3.

able directly by the protector mechanism The lever 11 has opposite the fulcrum a which will act through the clutch-actuating cylindrically curved projection 14- which means to move the brake lever and preferslidably engages the down-turned end. oiia ably also the shipper from running position keeper 15 which is adjustably secured by a to stopping position. 7 machine screw 16 to the stand 13. The tree Another object of the invention is to proend of the lever 11 is slotted and engages vide means normally connecting the shipper a stud 17 which extends upwardly from an and brake lever which will be automatically arm 18 of a skeleton sleeve 19 which is slidreleased when the brake and shipper levers ably mounted upon a rod 20 which is fixedly are moved from running to stopping posi mounted at its ends inthe loom side 2 and tion so that the brake can be released. to the auxiliary frame 3. A spring 21, encirpermit the loom to be turned over by hand cling the rod 20 and interposed between the without moving the shipper towards runend of the auxiliary frame and the adjaposition. cent end of the sleeve 19, tends normally to Qther objects and "features of the invenforce the sleeve toward the loom side thereion will more fully appear from the folby normally tending to move the lever 11.

upon its fulcrum in a direction to release the engagement between the co-operating clutch members.

The clutch members are forced into operative engagement in the construction illustrated herein by a toggle comprising a link 22 which is pivotally connected to a stud 23 upon a boss 2 1 projecting from the sleeve 19 and a co-operating toggle link 25 which is pivotally mounted upon a boss 26 on a collar 27 which is mounted on the end of the rod 20. The toggle links 22 and '25 are pivotally connected by a pin 28. A bifurcated coupling member 29 is pivotally mounted upon the pin 28 and is pivotally connected by a rod 30 to the lower end of the usual shipper 31 which is pivotally mounted on a stud projecting from a shipper bracket which is secured to the loom side 2.

The shipper 31 is in the form of a lever having a handle 34: by means of which it may be manually actuated. A brake lever .35 is fulcrumed upon the stud 32 and is provided with a downwardly extending end 36 having a lateral extension 87 which e2;- tends across the path of the shipper lever so that the shipper lever cannot be moved to starting position without actuating the brake lever to release the brake.

The mechanism heretofore described is of the usual character.

The protector mechanism of the loom may be of any usual character and as illustrated comprises a frog 38 which is slid-ably movable upon the loom side and, is engaged and moved by a dagger 89 upon bang-off. In prior constructions the frog 38 is provided with an arm or finger which, upon actuation of the frog at bang-off, engages the lateral. extension 37 of the brake lever and moves the brake lever and through it the shipper lever from running position to stoppin position. As heretofore stated the shock produced upon bang-off sometimes broke this arm and on other occasions the resistance of the brake lever caused the frog to be lifted.

The present invention comprises means directly connecting the frog to the toggle mechanism or other clutch-actuating means which operates upon bang-off to release the clutch without acting upon the brake lever and shipper lever in the manner above described. thereby eliminating the likelihood of breakage or improper operation of the clutch mechanism.

In the preferred embodiment of the invention illustrated herein the frog 38 is provided with a lateral extension 40 to which an L-shaped arm 11 is secured by a bolt or set screw 42. A rod 43 is slidably mounted in a suitable aperture in the depending end of the arm 1-1 and is provided with an abutment, such as, a washer 44: which is adjust-- ably secured upon the rod by set nuts 4L5.

The opposite end of the rod 43 is in the form of an eye which embraces a pin 46 which is mounted in a bifurcated extension d7 of the pin 28 which connects the toggle links together, the eye of the rod 43 lying between such bifurcations. In order to cushion the jar which is produced by the movement of the frog at bang-off a leather washer or other cushioning member a8 is interposed between the washer 4A and the arm 41.

In the operation of the stop mechanism the frog 38 is moved by the dagger 39 in the usual manner at bang-off. This causes the arm 4L1 to pull upon the rod 43, which is a tension member, and through it to break the toggle from the position shown in Fig. 2. When the toggle is thus broken the spring 21 moves the sleeve 19 longitudinally of the rod 20, thus causing the lever 11, which is pivotally connected to the extension 18 of the sleeve, to rock about its fulcrum, therebv shifting the gear 6 away from the co-operating clutch member 5. Thus it will be obvious that the clutchactuating member or toggle is actuated to release the clutch members directly by the movement of the frog. The movement of the frog, in addition to breaking the toggle link, also acts through the rod 30, which is connected at one end to the pin connecting the toggle links and at its other end to the shipper, to move the shipper toward stopping position.

Another feature of the invention consists in providing a detachable connection between the brake lever and the shipper which will cause the brake lever to be actuated to apply the brake when the shipper is moved to stopping position, but which connection will be automatically released when the shipper reaches stopping position, so that the brake lever can be independently moved to release the brake after the loom has stopped and thereby permit the loom to be turned over by hand.

In the preferred construction herein the means for connecting the shipper lever to the brake lever comprises a dog 49 which is pivotally mounted upon a stud 50 upon the shipper lever and has a hook-shaped end 51 which engages a shouldered projection 52 extending from the brake lever to ard the shipper. A stop 53 upon the shipper dcsirably is provided to hold the dog 4-9 in position to engage the projection 52 when the shipper is moved toward running position. The dog 19 is provided with an oppositely extending end or tail 5% which is adapted to engage an abutment projecting from the shipper stand as the shipper is moved to stopping position so that the dog 49 will be rocked out of engagement witl the shouldered projection 52 when the shipper reaches stopping posit-ion, thereby freeing the brake lever so that it can be aclit) tuated to release the brake after the loom has been stopped for thepurpose of permitting the loom to be turned over by hand.

It Will be understood that the particular embodiment of the invention shown herein is of an illustrative character and is not restrictive; that various changes in form, construction and arrangement of. parts may be made within the spirit and scope of the claims,

It will also be understood that the present invention is not confined to the particular clutch-actuating mechanisms which are illustrated herein, but may be applied to other constructions to which it may be adapted.

It will also be understood that the invention may include other automatic means for efl'ecting a stoppage of the loom adapted to act directly upon the clutch-actuating mechanism in the manner aforesaid instead of through the brake and shipper levers as is common in previous constructions Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

1. Stop mechanism for looms having protector mechanism including a movable frog, a driving clutch, clutch-actuating means, and a tension member connecting said frog and clutch actuating means and acting upon movement of said 'lrog by the dagger of the protector mechanism to release said clutch, a shipper and means connecting said shipper to said clutch actuating means operable thereby upon release of said clutch to move said shipper to stopping position.

2. Stop mechanism for looms having protector mechanism including a movable frog, a driving clutch, a spring tending to release said clutch, a shipper, clutch actuating means including a toggle connected to said shipper and operable when extended by the movement of said shipper torunning position to set said clutch in operative position, and a tension member connecting said frog and the joint of said toggle acting upon movement of said frog by the dagger of the protector mechanism to break said toggle and in conjunction With said spring to release the clutch.

3. Stop mechanism for looms having protector mechanism including a movable frog, a driving clutch, a spring tending to release said clutch, a shipper, clutch-actuating means including a toggle connected to said shipper and operable when extended by the movement of said shipper to running position to set said clutch in operative position, a rod pivotally connected to the joint of said toggle and provided with an abutment to be engaged by said frog upon movement of the V frog by the dagger of the protector mechanism and acting upon such movement of the frog to break the toggle and in conjunction with said spring to release said clutch.

4;;Stop: mechanism for loomshaving protector mechanism including a movable frog, a driving clutch, a sprlng tending to release said clutch, a shipper, clutch-actuating means including a toggle connected to said I! shipper and operable when extended by the movement of said shipper to running position to set'said clutch in operative position, a rod pivotally connected to the joint of said toggle and provided with an abutment to be engaged by said frog upon movement of the frog by the dagger of the protector mechanism and acting upon such movement of the frog to break the toggle and thereby in conjunction with said spring release the clutch and cushioning means intermediate of said frog and said abutment.

5. Stop mechanism for looms having protector mechanism including a movable frog, a driving clutch, a shipper, clutch-actuating means including a toggle connected to said shipper and operable when extended by the movement of said shipper to running position to set said clutch in operative position, a rod pivotally connected to the joint of said toggle and provided with an abutment to be engaged by said frog upon movement of the frog by the dagger of theprotector mechanism and acting upon such movement of the frog to break the toggle and thereby release the clutch, and means for adjusting the posi tion of said abutment.

6. Stop mechanism for looms having protector mechanism, a driving clutch, a spring tending to release said clutch, a shipper, 2 clutch-actuating means operable thereby when the shipper is moved to running position to'set said clutch in operative position and means connected to said clutch-actuating means operable by said protector mechanism to release said clutch and acting through said clutch-actuating means to cause said shipper to be moved to stopping position, a brake lever and means detachably connecting said shipper to said brake lever operable 11 by the movement of said shipper to stopping position to move said brakelever to brakeapplying position.

7. Stop mechanism for looms having protector mechanism, a driving clutch, a spring tending to release said clutch, a shipper, clutch-actuating means operable thereby when the shipper is moved to running position to set said clutch in operative position and means connected to said clutchactuating means operable by said protector mechanism to release said clutch and acting through said clutch-actuating means to cause said shipper to be moved to stopping position, a brake lever, means detachably 0011- necting said shipper to said brake lever oper able upon movement of said shipper to stopping position to nrove said brake lever to brake-applying position and means for automatically releasing said lever-connecting means when the shipper reaches stopping position, whereby the brake lever may be actuated to release the brake.

8. Stop mechanism for looms having protector mechanism, a driving clutch, a spring tending to release said clutch, a shipper, clutch-actuating means operable thereby when the shipper is moved to running position to set said clutch in operative position 1 and means connected to said clutch-actuating means operable by said protector mechanism to release said clutch and acting through said clutch-actuating means to cause said shipper to be moved to stopping position, a latch pivotally mounted on said shipper engaging said brake lever and having a tail extending beyond said shipper and a stationary abutment positioned to engage said tail when the shipper reaches stopping posi- HARRY A. DAVIS.

'tion and operable to release said latch from 20 

